CVE-2009-4762 MoinMoin Improper Access Control vulnerability

High 7.5 Published Updated

Remote attackers can bypass intended access restrictions in MoinMoin Wiki by exploiting improper hierarchical ACL checks.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Over the internet
Victim action needed
Not needed
Fix
Available

What is CVE-2009-4762?

CVE-2009-4762 is a high-severity authentication bypass vulnerability in n/a, published on 29 Mar 2010. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

MoinMoin 1.7.x before 1.7.3 and 1.8.x before 1.8.3 checks parent ACLs in certain inappropriate circumstances during processing of hierarchical ACLs, which allows remote attackers to bypass intended access restrictions by requesting an item, a different vulnerability than CVE-2008-6603.

Weakness: CWE-264

Which versions are affected by CVE-2009-4762?

5 open source packages ship an affected version, including moin. It affects 1 product.

PackageAffectedFixed in
moin PyPIFrom 1.71.7.3, 1.8.3
moin PyPIFrom 1.7.01.7.3
moin PyPIFrom 1.7.01.7.3
moin PyPIFrom 1.8.01.8.3
moin PyPIFrom 1.8.01.8.3

Products include Moinmo Moinmoin.

How do I fix CVE-2009-4762?

Upgrade moin to a fixed version for your release line: 1.7.3 or 1.8.3.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2009-4762 being exploited?

There is no known exploitation of CVE-2009-4762 in the wild and no public exploit code.

Sources

Also known as GHSA-jj23-fj2v-m872, PYSEC-2010-13.

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